Retrieval of phenological stages of onion fields during the first year of growth by means of C-band polarimetric SAR measurements

The phenological stages of onion fields in the first year of growth are estimated using polarimetric observables and single-polarization intensity channels. Experiments are undertaken on a time series of RADARSAT-2 C-band full-polarimetric synthetic aperture radar (SAR) images collected in 2009 over...

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Bibliographic Details
Published inInternational journal of remote sensing Vol. 36; no. 12; pp. 3077 - 3096
Main Authors Mascolo, L., Lopez-Sanchez, J.M., Vicente-Guijalba, F., Mazzarella, G., Nunziata, F., Migliaccio, M.
Format Journal Article
LanguageEnglish
Published Taylor & Francis 18.06.2015
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Summary:The phenological stages of onion fields in the first year of growth are estimated using polarimetric observables and single-polarization intensity channels. Experiments are undertaken on a time series of RADARSAT-2 C-band full-polarimetric synthetic aperture radar (SAR) images collected in 2009 over the Barrax region, Spain, where ground truth information about onion growth stages is provided by the European Space Agency (ESA)-funded agricultural bio/geophysical retrieval from frequent repeat pass SAR and optical imaging (AgriSAR) field campaign conducted in that area. The experimental results demonstrate that polarimetric entropy or copolar coherence when used jointly with the cross-polarized intensity allows unambiguously distinguishing three phenological intervals.
ISSN:0143-1161
1366-5901
DOI:10.1080/01431161.2015.1055608